Electronics > Projects, Designs, and Technical Stuff
where does one buy a 600VDC 10kW power supply?
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Simon:
No the TDK does not power flex.
NiHaoMike:

--- Quote from: Simon on February 09, 2020, 08:33:28 am ---He is not electrically minded, that is what my job is. I know they won't want to spend a fortune and i can only but advise. I already avoided offering some options because i personally was not happy but i have to show him reasonable options.

All of the decent supplies seem to offer the same things. digital interfaces of various sorts, master slave control modes with the ability to series/parallel same supplies, over voltage lockout useful for locking an over 1kV supply at less than 1kV. Some offer auto power ranging or power flex but many don't. Some have crap warranty and anything useful is an optional and some just give you the works out of the box. While i was originally asked for 600V 10kW I have since managed to establish that actually he wants to work down to 400V and up to 15-16kW and that 21kW would be ideal. So i have investigated units that do power flex/autoranging. The jury is still out as i am waiting for more quotes to come in.

2 of those TDK lamda's in the 15kW variants would be good enough but let's see what else there is. I have been shown some ITECH datasheets of units that look very good and are very cheap but I have also been warned about the quality.

--- End quote ---
How about a large 3 phase variac (or even an autotransformer with selectable taps) going into a rectifier and then into a large capacitor bank? Then add some DC contactors (the kind used in EVs) on the output, a rectifier load rated RCD/GFCI on the input, and a bleeder/indicator circuit.

You can also look into EV fast chargers, but I suspect they're designed as current sources and would require a large capacitor bank in order to have any hope of getting a good transient response.
Simon:
I think we would be best buying an off the shelf solution so that we are covered in terms of safety. I already have enough work as it is and if they employ someone external (we have a person not that he is much more experienced than me in high voltage stuff) then suddenly it's starting to be more hassle and just as expensive and so muh les flexible.
trobbins:
Given the application is not distributing the DC then that certainly alleviates a variety of safety concerns. 

And yes if you have no in-house electrical engineering capable of setting up a simplified supply, then a commercial supply that complies with all applicable standards (whether it be for mains connect aspects, or safety to operators, or something related to connectors if you are not using fixed wire to the load equipment) is appropriate. 

I'd suspect that safety related aspects of the total system would need to be competently assessed and documented, as a way to cover identifiable risks, and that mitigating those risks comes back directly to the specs of the power supply just as much as the connection and use of the power within your widget.  Just one example is whether there is active monitoring of the DC rails with respect to an earth fault - the power supply may include that - if not then commercial devices like from Bender can be used for interlocking.
Phoenix:
We recently got an ITECH regenerative DC supply https://www.itechate.com/, they do plenty of other supplies to and perhaps a bit cheaper than some of the big names. Website isn't great; but their support was pretty good when we had some initial problems with a faulty internal fan causing the unit to trip.

I've also used Magna Power in the past and they were fine too.
https://magna-power.com//
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